Q278: Evaluate.<br>- <span class="ql-formula" data-value="x y^{1}"><span class="katex"><span
Q279: Multiply.<br>- <span class="ql-formula" data-value="\left(x^{4}+4\right)\left(x^{4}-4\right)"><span class="katex"><span class="katex-mathml"><math
Q280: Identify the coefficient of each term
Q281: Multiply.<br>- <span class="ql-formula" data-value="(x-5)(x-8)"><span class="katex"><span class="katex-mathml"><math
Q282: Evaluate.<br>- <span class="ql-formula" data-value="y^{11}"><span class="katex"><span class="katex-mathml"><math
Q284: Convert to decimal notation.<br>- <span class="ql-formula"
Q285: Simplify.<br>- <span class="ql-formula" data-value="\left(x^{-4}\right)^{-4}"><span class="katex"><span class="katex-mathml"><math
Q286: Express using positive exponents. Then simplify.<br>-
Q287: Write the number in scientific notation.<br>-0.000008656<br>A)
Q288: Multiply mentally<br>- <span class="ql-formula" data-value="\left(x-6 x^{3}\right)^{2}"><span